Machine for making cement pipes.



J. THOMAS.

MACHINE FOR MAKSNG CEMENT PIPES.

APPLICATION FILED MOLE m5.

1,21 1,787. Patented Jan. 9,1917.

3 SHEETS-SHEET I.

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MACHINE FOR MAKING CEMENT PIPES.

APPLICATION FILED NOV- 6. I915.

Patented Jan. 9, 1917.

3 SHEETSSHEET 2;

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MACHINE FOR MAKING CEMEIH PIPES.

APPLICATION FILED NOV. 6. 1915.

1 21 1 787, Patented Jan. 9,1917.

7 3 SHEETS-SHEET 3.

JAMES THOMAS, or TACOMA, WASHINGTON.

' MACHINE FOR MAKING CEMENT PIPES.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed. November 6, 1915. Serial No. 59,906.

To all whom it may concern:

Be it known that I, JAMEs THOMAS, a citizen of the United States, residing at Tacoma, in the county of Pierce and State of Washington, haveinventedcertain new and useful Improvements in Machines for Making Cement Pipes, of which the following is tion and whereby pipesmay be more rap-- idly andeconomically produced.

The invention consists In the novel con-- struction, arrangement and combination of parts, as will be hereinafter described and claimed. I

In the accompanying drawings, Figure 1 1s a front elevation of a'cement pipe mach ne embodying my invention. Fig. 2 is a transverse vertical section taken substantially through 22 of Fig. 1. Fig. 3 is a horizontal section through 33 of Fig. 2 with parts omitted. Fig. i is a top plan view of the machine frame. Fig. 5 is a transverse verti cal sectional view of the mold and parts associated therewith in the'forming of a pipe. Fig. 6 is a fragmentarysectional view of the lower ends of a pipe and the mold in the positions occupied after the latter has been released. Fig. 7 is a View similarto Fig. 5 illustrating the positions of certain parts in one stage of operation. Fig. 8 is a sectional view through 88 of Fig. 5. Fig. 9 is a sectional view through 99 of Fig. 5 with the pipe and core omitted. Fig. 10 is a detail. horizontal sectional view of a portion of the mold. Fig. 11 is a perspective view of one of the moldstands shown detached. Fig. '12 is a longitudinal sectional view to illustrate the driving shaft of the machine and the various devices for transmitting power therefrom. Fig. 13 is a view partly in side elevation a ndpartly 'invertical section of a modified construction to illustrate the manner of employing two tables alternately and the controlling mechanism therefor.

The improved machine is provided'with a main frame comprising post members 2 extending upwardly from a base 3 and rigidly connected at their upper ends to longitudinal tie-plates e and transverse tie-plates 5 and :5 To one side of such main frame and rigidly connected therewith are upright posts 6 which serve to support the hereinafter explained concrete agitating and feeding appliances.

As shown in Fig. 2,1 provide upon a bridge element 3 of the frame base 3 a fixed standard 7 having a central portion which serves as the journal bearing for the hub of a rotary table 8 and extends'above the latter to terminate in a polygonal upper end 7 above a shoulder-T of the standard.

' The table 8 is provided on its under side withconcentrically arranged circular racks 8 and s which are adapted to'be selectively used with toothed pinions 9? or 9 to effect the rotation of the table at different speeds from a shaft 10. Thisshaft-is journaled near one of its ends in a box 11 on the frame base and in a socket (Fig.12) provided in a shaft extension 12 at its other end, said extension being in turn j'ournaled in a box 11 Said extension is formed at its outer end with portions 12 and 12 which are respectively adapted to fit into the bores of the above-mentioned pinions 9 and 9 Said extension is also formed with or has rigidly secured thereto a member 13 of a friction clutch whose otherimember 13 is s'plined to the shaft and may be shifted into and out of engagement by a controlling lever 13 according to whether the table is to be rotated or otherwise.

-' The shaft 10 is driven in any suitable manner, as by means of a power belt, not shown, passing about a pulley M of the shaft.

15 represents a mold with a cylindrical central portion and an enlarged upper portion 15 which conforms to the outer surface of the hub end P Fig. 5, of a pipe P which is molded therein. At its lower end the mold is provided with an internal flange 15 to sustain the pipe support or palette 16, and at the outer side is a peripheral flange 17 from which protrude a number of spaced lugs 17 16 represents legs provided for said palette, and are utilized for holding the latter when the mold is being disconnected from a pipe. Said mold is constructed of two or more separable parts which are secured together by clamps, such as 18, Fig. 10, engaging upright flange elements 15 provided adjacent to the joints between the mold parts; Chairs 19 are secured in adjusted positions upon the table and are each formed with a seating surface 19 for the lower edge of the mold and are also formed with a laterally extending branch 19 to afford a hook to engage over a lug 17 of the mold to lock the latter in place upon the table. 7

20 represents a cylindrical core which in use is supported upon the standard shoulder 7 2 and having at its bottom a polygonal socket 20 to fit the standard end 7 in various rotary positions, and when thus engaged the core is prevented from turning. At its upper, end the core 20 is provided with a hub 20 in which is the cylindrical socket. 20 to accommodate a correspondingly shaped lower end 21 of an upright bar 21 which is thereabove rectangular in horizontal section.

The core is secured in various rotary positions to the bar 21 by a pin 22 inserted in selected holes 21 (Fig. 8) of the bar and holes 20 provided in the diametrically opposite sides of the core hub 20*. Bar 21 serves to retain the upper end of the core in axial alinement with the table and is itself held in such relative position by extending the same in guideways 5 of the frame elements 5.

r The core is elevatedor lowered by meansof a cable 23 having a bight thereof engage the bar by extending through a hole 21 provided in-the latter adjacent to its connection with the core. From such bight the cable extends in twoleads 23 vertically upward and over guide sheaves 24 mounted in the opening between the frame elements 5 and thence about sheaves 24 24 and 2 1? to a drum 25 to which therextremities of the cable leads are secured.

To insure an equal winding or unwinding of both of the cable leads on or from the drum, the drum is provided with helical grooves 25 and 25 which extend from near its midlength to the drum ends. The guide sheaves 24 which are disposed in proximity to said drum are mounted on shafts 24 so as to be movable axially of the respective shafts when the cable is influenced by the drum grooves.

The drum is loosely mounted upon a jack shaft'26 which is driven from the main shaft 10 preferably by a chain 27 passing about sprocket wheels 26 and 10 provided on the respective shafts. ,To couple the drum to theshaft 26, a clutch element 26 rigidly secured to the shaft, is frictionally engaged by a clutch element 25 provided on the drum when the latter is suitably shifted as by a provide an internal form for the mouth or bell-end P of a pipe. Said collar during the making of the part of a pipe below such bell-end may be tilted out of the way, as indicated in Figs. 2 and '7 and when it is to be utilized, the collar is held in the position in which it is shown in Fig. 5 by means of lugs '30 provided on the collar engaging the upper endof the core. I

The concrete for making pipe is supplied to the space within the mold 15 through a chute 31 from a hopper 31 which is support ed by the frame posts 6. a

The effective size of the outlet opening 31 of the hopper may be regulated by a gate 31 Extending into said hopper is an upright shaft 32 provided with fingers 32 whereby the material adjacent to the hopper out let is stirred or agitated to prevent the same from solidifying and to be in a homogeneous condition. The shaft 32 is rotated by means of bevel gear wheels 33 from a shaft 34 which, as illustrated, is driven from shaft 26 by a belt or chain 34: through the medium of pulleys or wheels 34 and 26 on the respective shafts.

35 represents a tamping bar guided for vertical reciprocatory movements in bracket arms 36 of a carriage 36 movable on horizontal track-rails 37 which are secured to the frame. a This carriage is provided with a bearing box 36 for a shaft 38 provided with a square portion 38 which is slidable endwise in similar shaped apertures in a beltpulley 38 and bushings 39 which are jour-. naled in boxes 39 fixedly secured to the machine frame.

40 denotes the belt for transmitting rotary motion from a pulley 4L1 on the shaft 10 to the pulley 38 to drive the shaft 38. The shaft 38 isarranged radially or nearly so to the axis of the bar 21 and at its end adjacent thereto carries a disk 12 having a crank pin 42 which is operatively connected by a rod 43 with a stud orpin 44 of a chambered block 44 through which'extends the tamping bar 35. Said block is provided in teriorly with devices, not illustrated, which are adapted to frictionally engage the tamping bar to resistingly hold the latter against axial movement with respect to the block.

The tamping-bar in the early part of its operation is grippedin such position in the block 44 so that it will almost reach the table when at the lower end of its stroke, as effected by the revolution of the crankpin 42 As the mold is fed with the concrete, the accumulation of the material will progressively cause the tamper to be shoved up throughsaid block subject to the resistance due to the bar gripping devices of the block, and which may be adjusted so that the proper force will be applied to the work.

I show in Fig. .14 a manner of supporting in a step-bearing 52 so that said tables may be alternately revolved into axial positions with the core for making a pipe.

Where two tables are thus used, the frame beam 3 is provided with a protuberance 3 to engage in recesses 50 or 50 as they are successively presented thereto. To cause such engagement of the platform with said protuberance, the platform is first elevated to raise the same from its engagement and after the platform has been manually or otherwise rotated, the platform is lowered to lock it in its adjusted position; to which ends the post 51 is provided with a screw-thread 51 which is engaged with an internal screw-thread of a wheel 53 sup ported by the step-bearing 52.

5 1 is a cable having a weight 5& at one end andafter passing over a guide pulley 55 is wound in a number of turnsabout a wheel 53 and thence about a guide-pulley 56 to a drum 57 to which the other end of the cable 5 1 is secured. This drum is rotatably mounted on a power driven shaft and is coupled therewith when desired, by a clutch element 57 of the drum being en gaged by a clutch element 13 which is engaged with the shaft 10 as by a spline, not shown. The clutch element 13 is shifted by a forked lever 13 and may also be utilized to actuate the clutch element 13 for the shaft extension 12 which, as shown in Fig. 14, is formed at one end of the element 13.

To operate the above described platform, the drum 57 is coupled to the shaft 1O" resulting in the winding of the cable 5e about the drum and the rotation of the wheel 53 which serves as a nut upon post 51 to cause the platform to be raised from its engaged position with the frame pro- .tuberance 3 whereupon the platform is rotated to transpose one end of the platform for the other. When this is accomplished, the drum 57 is released from its shaft and the power of the weight 54 asserts itself to rotate the wheel 53 so as to lower the platform into locking position.

The operation of the invention may be explained as follows: Vith the table 8 motionless, the mold 15 is secured centrally thereon by rotating the mold on the chair seats 19 to engage the lugs 17 under the chair branches 19 The drum is then uncoupled from the shaft 26 to lower the core 15 into engagement with the standard end 7 and whereby the core is secured against turning. Then the collar 30 is tilted to one side, as represented in Fig. so as not to interfere with the operation of the tamping-bar 35. The shaft extension 12 upon which one of the bevel-gears 9 or 9 has been secured, is then operatively' connected by clutch elements 13 and 13 to the shaft 10 to effect the rotation of such gear to drive the table, through the agency of the rack 8 or 8 As the table is thus driven, concrete is supplied from the hopper 31 through the chute 31 into the space surrounding the core in the mold and as such material is deposited in the mold, it is compacted through the office of the tamping-bar 35. This tamping-bar, as before explained, is yieldingly carried in a block 4& so that as the material rises toward the top of the mold, the tampingbar will correspondingly slide upwardly through the box subject to the resistance due to the frictional engagement of the referred to devices in such block. After the concrete has been supplied to about the bottom of the enlarged portion 15 of the mold, the carriage 36 is moved back to carry the ta-mping bar into proximity to the inner periphery of the mold part 15 The collar 30 is then placed in its operative position, as represented in Fig. 5, and the filling in and tainping of the material is proceeded with until a pipe is completed.

In the above described operation, the core remains stationary while the mold and palette rotate with the table and by reason of the surfaces of the mold and palette which are in contact with the material being greater than the surface of the core which contacts with the material, the pipe in process of making is rotated with the mold and the inner pipe surface is rubbed against the core to effect the glazing of such inner surface.

When a pipe has been formed in the mold the core is withdrawn by hoisting the same through the instrumentality of the cable 23 which, by being arranged to suspend the core-supporting bar 21 in a bight of the cable and between two leads which extend vertically, the bar and core are raised axially of the pipe.

The mold with the contained pipe and palette 16 are removed from the table and placed on a floor F, Fig. 6, whereupon the clamps 18 are disengaged to release the pipe and the mold then drops to the floor while the pipe is maintained at a distance above the floor by being borne upon the palette which is itself held by the legs 16 By thus allowing the mold to fall in a direction axially of the pipe, the mold is freed and enables it to be opened and removed with out any cement adhering thereto, as will occur when the mold is opened without first dropping to strip it from the material.

en a pipe and its mold have been removed from the table, it is replaced by another mold and a pipe formed therein, as described.

By the provision of a polygonal end 7 to the core-supporting standard and with a similar shaped socket in the core, the core may be held in its various rotary positions so as to successively present new portions to where the'tamping is being effected for,

otherwise, a non-rotatable core would soon become worn at one side and become un-- fitted for use. 7

What I claim as my invention, is- 1. In a machine of the class described, the combination with a mold, a rotary table for supporting said mold, and means to rotate the table and said mold, a non-rotatable standard extending upwardly through the center. of said table, a core provided with means engageable with said standard whereby the core is held centrally of the table and against rotary movements.

2. In a machine of the class described, the combination with a mold, a rotary table for supporting. said mold, and means to rotate .the table and said mold, a non-rotatable standard extending upwardly through the center of said table and terminating above the latter in a polygonal head, and a cylindrieal core provided at its lower end with a socket, 'said socket being adapted to engage the standard at various rotary positions of the core, to secure the latter against rotary movements.

3. In a machine of the class described, the

combination with a mold, a rotary table for supporting said mold, and means to rotate the table and said mold, a non-rotatable standard extending upwardly through the center of said table and terminating above the latter ina polygonal head, a cylindrical core provided with a socket in-its lower end,

7 said socket being adaptedto engage the standard at various rotary positions of the core to secure the latter against rotary move ments, a hoisting rod for said core, and means to secure the core to' said rod in selected rotary positions.

4; In a machine of the class described, a core, anupright rod having an opening adj a- Oopiee of thil' patent may be obtained for cent its lower end, means to detachably connect said core to the lower end of the rod, a guide for said rod, a hoisting cable arranged with a bight engaging said rod in the opening thereof, a cable winding drum, and guide sheaves for directing said cable to extend upwardly at opposite sides of the rod from said opening and thence to said drum.

5. In a machine of the class described, the combination with the rotary table, a mold provided with an enlarged upper end, va cylindrical core, non-rotatable means extending through the table for supporting the core and also securing the same against rotation, and a collar provided with means whereby the collar may be detachably supported by the core, said collar serving as an internal form for the bell-mouth of a pipe.

6. In a machinetof the class described, the combination with a rotary table, and a mold formed of separable members, of

chairs provided upon the table for supporting said mold at a distance thereabove, a palette adapted to be supported by the mold when the latter is supported by said chairs, and means provided on the palette whereby the same is supported when the mold is disengaged from the palette.

7. In a machine of the class described, in V five cents each, by addressing the Commissioner of Patente. Washington, D. C. o 

